Device for securing harrow or cultivator teeth



DANIEL MCKENZIE, OF \VATROUSVILLE, MICHIGAN, ASSIGNOR OF T\VO- THIRDS TO IVILL N. \VALTON, OF SAME PLACE, AND GEORGE REID, OF

REESE, MICHIGAN.

DEVICE. FOR SECURING HARROW QR CULTEVATOR TEETH.

SPECIFICATION forming part of Letters Patent No. 358,869, dated h Iarch 8, 1687.

Application filed December 23, 1886. Serial No. 222,404. (No model.)

To (LZZ whmn it may concern.

Be it known that I, DANIEL MCKENZIE, a citizen of the United States, residing Watrousville, in the county of Tuscola and State of Michigan, have invented a new and useful Improvement in Devices for Securing Harrow or Cultivator Teeth to Sup aortiug-Beams, of which the following is a specification.

My invention relates to improvements in devices for securing harrow or cultivator teeth to the supporting-beams; and it consists in certain novel features, hereinafter described and claimed.

In the drawings, Figure l is a perspective view of my improved devices. Fig. 2 isa vertical section, and Fig. 3 isa horizontalsection, of the same; and Fig. 4 is a detail perspective view of the couplingplate.

Referring to the drawings by letter, A indi- 2o cates a portion of one of the beams or toothbars of the cultivator or harrow frame, and B is the tooth secured thereto in the manner which Iwill now proceed to describe.

The tooth B consists of a metal band bent in approximately a semicircle, its lower end :forming the tooth proper, or having the tooth secured thereto. The upper end of the tooth is bent upon itself to form the loop I), through which the pivot pin or bolt passes, as will be 0 presently set forth.

O is the coupling-plate. It consists of a metal plate given the proper curvature to conform to the forward rounded side of the toothbar A. The lower end of this plate is provided with two depending perforated lugs, c c.

The distance between these lugs is just sufficient to admit the loop I) on the upper end of the tooth B, which is held therein by the coupling or pivot pin or bolt D passed through the said loop and the perforations in the lugs c c. The upper end of the coupling-plate is provided with two backwardly extending wings, E, between which the end of the spring F passes,and by which it is held in place. The

rear side of the coupling-plate is smooth and rests against the end of the spring F. Its

front side is provided about midway its ends with two ribs or ridges, G, which extend across the face of the plate, from side to side of the thereby holds it to its work.

same. A clip or U shaped bolt, H, having its 0 legs h passed through the tooth-bar in a horizontal plane, serves to secure the couplingplate to the said tooth-bar. The shoulder or crossbar h of the clip passes across the face of the coupling-plate between the ribs G thereon,between which it fits snugly, as shown.

A washer-plate, I, is slipped over the ends of the legs 7b of the clip, and up against the rear side of the tooth'bar A,and nuts t on the ends of the lugs h are turned up against this washerplate to clamp the several parts together.

The spring F, above referred to,is formed of aband of stout spring metal ofthe same width as the tooth B. Its upper end is passed downward between the front side of the beam and 6 5 the rear side of the coupling'plate, and between the wings E, as before stated. The spring is then passed over and back of the beam, forming very nearly a semicircle, and is then turned downward, its lower end resting against the back of the tooth. A slight distance above the extreme lower end of the spring are two wings, f, projecting forward from its edges past the tooth. These wings f are perforated, and a bolt, f,is passed through the perforations, serving to. hold the ends of the spring to the tooth.

The operation of my device, it is thought, will be readily comprehended. As the harrow or cultivator is drawn along the ground the spring presses the tooth forward, and Should an on structionsuch as a root, large stone, &c. be met, the tooth will swing upward and backward upon the pivot-pin D until the obstruction is passed, when the spring will cause the tooth to at once resume its former position.

The advantages of my improved construction should be appreciated upon a casual examination. The clip H being passed through 9c the tooth-bar, its legs are protected from injury and the clip is prevented from moving from its place. After the nuts 2' have been turned home the parts are securely clamped together and all movement of the couplingplate, either vertically or horizontally, is prevented by reason of the shoulder of the clip fitting snugly between the ribs G, and consequently bearing directly against the inner sides clip and moving the end of the spring F under the couplingplate downward. The coupling-plate being placed in front of the beam throws the tooth ahead, and thus prevents clogging.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s

1. The combinati0n,with the tooth-bar,ofthe coupling-plate having ribs G across its face, the tooth pivotally attached to its lower end, the spring F, having its upper end held between the toothbar and the coupling-plate, and having its lower end connected to the tooth, and the clip or Ushaped bolt passed through the tooth-bar and across the coupling plate between the ribs G, substantially as set forth.

2. The combination, with the tooth-bar, of the coupling-plate having ribs Gr across its face, the tooth pivotally attached to the lower end of the plate, the spring F, having its upper end held between the coupling-plate and the tooth-bar, and having its lower end provided with the wings f, projecting forward of the tooth, a bolt passed through these wings across the face of the tooth, and the clip passed through the tooth-bar and across the face of coupling-plate and the tooth-bar, and between the wings E, and the clip passed through the tooth-bar and across the coupling plate between the ribs G, substantially as described and shown.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

DANIEL MCKENZIE.

\Vitnesses:

ELLSWORTH H. DIMOND, JOHN HENNING. 

